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jack schafer

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The Truth Detector: An Ex-FBI Agent's Guide for Getting People to Reveal the Truth

Jack Schafer

The Truth Detector : An Ex-FBI Agent's Guide for Getting People to Reveal the Truth

Jack Schafer, Marvin Karlins

The Like Switch: An Ex-FBI Agent's Guide to Influencing, Attracting, and Winning People Over

Jack Schafer, Marvin Karlins

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